ldc-gen-game-web/app/Models/Prize.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Prize extends Model
{
    public function gain_view()
    {
        return $this->belongsTo(GainView::class, 'gain_view_id');
    }

    public function instant_wins()
    {
        return $this->hasMany(InstantWin::class, 'prize_id');
    }
}